Home / 1,388,362.76-1,915,926.18-776,508.20

Finding the Fourth Proportional to 1,388,362.76, 1,915,926.18 and 776,508.20

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Solution

The fourth proportional to 1,388,362.76, 1,915,926.18 and 776,508.20 is: 1,071,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,362.76 : 1,915,926.18 = 776,508.20 : x
  2. Step 2: Convert to fraction form
    1,388,362.76/1,915,926.18 = 776,508.20/x
  3. Step 3: Cross multiply
    1,388,362.76x = 1,915,926.18 × 776,508.20
  4. Step 4: Simplify right side
    1,388,362.76x = 1,487,732,389,364.68
  5. Step 5: Solve for x
    x = 1,487,732,389,364.68/1,388,362.76
  6. Step 6: Final answer
    x = 1,071,573.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.